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<p class="level0"><a name="NAME"></a><h2 class="nroffsh">NAME</h2>
<p class="level0">CURLOPT_DEFAULT_PROTOCOL - default protocol to use if the URL is missing a scheme name <a name="SYNOPSIS"></a><h2 class="nroffsh">SYNOPSIS</h2>
<p class="level0">&#35;include &lt;curl/curl.h&gt; 
<p class="level0">CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DEFAULT_PROTOCOL, char *protocol); <a name="DESCRIPTION"></a><h2 class="nroffsh">DESCRIPTION</h2>
<p class="level0">This option tells libcurl to use <span Class="emphasis">protocol</span> if the URL is missing a scheme name. 
<p class="level0">Use one of these protocol (scheme) names: 
<p class="level0">dict, file, ftp, ftps, gopher, http, https, imap, imaps, ldap, ldaps, pop3, pop3s, rtsp, scp, sftp, smb, smbs, smtp, smtps, telnet, tftp 
<p class="level0">An unknown or unsupported protocol causes error <span Class="emphasis">CURLE_UNSUPPORTED_PROTOCOL</span> when libcurl parses a schemeless URL. Parsing happens when <span Class="emphasis">curl_easy_perform(3)</span> or <span Class="emphasis">curl_multi_perform(3)</span> is called. The protocols supported by libcurl will vary depending on how it was built. Use <span Class="emphasis">curl_version_info(3)</span> if you need a list of protocol names supported by the build of libcurl that you are using. 
<p class="level0">This option does not change the default proxy protocol (http). 
<p class="level0">Without this option libcurl would make a guess based on the host, see <a Class="emphasis" href="./CURLOPT_URL.html">CURLOPT_URL</a> for details. <a name="DEFAULT"></a><h2 class="nroffsh">DEFAULT</h2>
<p class="level0">NULL (make a guess based on the host) <a name="PROTOCOLS"></a><h2 class="nroffsh">PROTOCOLS</h2>
<p class="level0">All <a name="EXAMPLE"></a><h2 class="nroffsh">EXAMPLE</h2>
<p class="level0"><pre class="level0">
curl = curl_easy_init();
if(curl) {
&nbsp; /* set a URL without a scheme */
&nbsp; curl_easy_setopt(curl, CURLOPT_URL, "example.com");
&nbsp;
&nbsp; /* set the default protocol (scheme) for schemeless URLs */
&nbsp; curl_easy_setopt(curl, CURLOPT_DEFAULT_PROTOCOL, "https");
&nbsp;
&nbsp; /* Perform the request */
&nbsp; curl_easy_perform(curl);
}
</pre>

<p class="level0"><a name="AVAILABILITY"></a><h2 class="nroffsh">AVAILABILITY</h2>
<p class="level0">Added in 7.45.0 <a name="RETURN"></a><h2 class="nroffsh">RETURN VALUE</h2>
<p class="level0">CURLE_OK if the option is supported. 
<p class="level0">CURLE_OUT_OF_MEMORY if there was insufficient heap space. 
<p class="level0">CURLE_UNKNOWN_OPTION if the option is not supported. <a name="SEE"></a><h2 class="nroffsh">SEE ALSO</h2>
<p class="level0"><a Class="manpage" href="./CURLOPT_URL.html">CURLOPT_URL</a><p class="roffit">
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